| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a 7000-based aluminum alloy extruded material with which after working the 7000-based aluminum alloy material into a case-type with a cutting-work (shaving), when an anodic oxidation treatment is applied on the surface, the generation of the color-irregularity on a film is prevented to generate the silver-color film without showing yellowish. <P>SOLUTION: The 7000-based aluminum alloy extruded material is composed by mass of 5.5-7.5% Zn, 1.2-2.2% Mg, 0.01-0.1% Ti, and regulated to ≤0.05% the total of Mn, Cr and Zr and ≤0.10% Cu and the balance Al with inevitable impurities, and has an equiaxial granular structure in the cross-sectional surface. The extruded material is worked into the case-type with cutting work and on the surface, the anodic oxidation treatment is applied. The case-type is suitable for a laptop personal computer, cellular phone, digital camera, etc. <P>COPYRIGHT: (C)2013,JPO&INPIT |
